Slate Digital Strongroom London Expansion Pack (ESD); microphone simulation add-ons suitable for the Slate Digital ML-1 Modeling Microphone; contains 5 additional microphone classics from the Strongroom Studios, London, modeled for the ML-1 microphone; SD-414 BU: reference microphone from Austria with linear frequency response for voices, piano, percussion and other complex signals; SD-414 EB: a classic microphone with character for vocals, acoustic guitar and many other sources; SD-12 VR: legendary tube microphone, from Austria too, with an unrivalled sound and character; SD-47 FET: very popular, versatile microphone, suitable for vocals, horns, guitar amps, bass amps and kick drums; SD-4038: unique ribbon microphone that has evolved from a BBC quasi-standard to a globally acclaimed classic; system requirements: Slate Digital Virtual ML-1 Modeling Microphone hardware